Review on Dlyfull Universal Battery Tester: LCD Display & Digital Voltage Resistance Checker For AA AAA C D 9V 12V 18650 CR123A 2CR5 CR2032 Cells by Tyler Blake

Overall nice battery tester. This tester displays the 'Internal Resistance' value, which is helpful to determine the quality of the battery and how well it will perform. It's capable of testing many different batteries(sizes, volts, chemistry types). I was able to quickly check my collection of 18650, 14500, AA, AAA batteries.I would have giving 5 stars; however, minor improvments are needed: (1) missing a stand which would help with viewing the display. (2) the wires/leads are too stiff making it tangle and difficult to manage. (3) the wires/leads are hard wired (soldered to circuit board) at the bottom of the case, so the tester can only be propped up on it's side. The leads should have been placed on the front of case with the ability to remove and replace.Helpful tips: (1) The lower resistance is best performer. (2) write the internal resistance on each battery with a marker. (3) high resistance is most likely older battery and will not perform well or last long. (5) Use batteries with matching or similar resistance in devices that require multiple batteries.